Get the face mapping done if you can but you can't go wrong with the Essential Cleansing solution if you wear makeup and want to hot cloth it off and cleanse all in one, and if you like a foaming cleanser then you can't go wrong with the Special cleansing gel.
For a good, all round, morning and evening moisturiser, the Skin Smoothing Cream is excellent.
None of those products mentioned are too extreme one way or the other - they are generally suitable for all skin types except for very oily or very sensitive. So unless you swing wildly in one direction or other, you really can't go wrong. The beauty of it is you can do a Dermalogica routine on as little as 2 basic products - the cleanser of your choice and that Skin Smoothing Cream. So that's a very good place to start.
Frown lines. No moisturiser can do much for them. They are dynamic lines. Being well moisturised is great for fine lines round the eyes etc, but there is but one thing that will stop those frown lines from forming and that is Botox. If you dont want to go there, then at least try and stop frowning!
Seriously, they happen, and its not down to bad skincare. But good skincare is great to have.